Display panel with a graphical user interface



FIG. 1 is a front view of a display panel with a graphical user interface (GUI) showing a first image in a sequence of images; and,

FIG. 2 is a front view of a second image in the sequence.

The broken lines shown in the figures including portions of the display panel and portions of graphical user interface are for the purpose of illustrating portions of the article and form no part of the claimed design. The second large rectangle shows the display panel with everything outside being the device and everything inside being the graphical user interface.

The appearance of the transitional image sequentially transitions between the images shown in FIGS. 1-2. The process or period in which one image transitions to another forms no part of the claimed design. 

CLAIM We claim the ornamental design for a display panel with a graphical user interface, as shown and described. 